import os
import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter
from django.conf import settings

font_path = settings.STATICFILES_DIRS[0] + os.sep + 'font' + os.sep + 'RAVIE.TTF'


def verify_code(width=128, height=30, char_length=5, font_file=font_path, font_size=28):
    code = []
    img = Image.new(mode='RGB', size=(width, height), color=(255, 255, 255))
    draw = ImageDraw.Draw(img, mode='RGB')

    def rndChar():
        """
        生成随机字母
        """
        return chr(random.randint(65, 90))

    def rndColor():
        """
        生成随机颜色
        """
        return (random.randint(0, 255), random.randint(10, 255), random.randint(64, 255))

    # 写文字
    font = ImageFont.truetype(font_file, font_size)
    for i in range(char_length):
        char = rndChar()
        code.append(char)
        h = random.randint(0, 4)
        draw.text([i * width / char_length, h], char, font=font, fill=rndColor())

    # 写干扰点
    for i in range(40):
        draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())

    # # 写干扰圆圈
    # for i in range(40):
    #     draw.point([random.randint(0, width), random.randint(0, height)], fill=rndColor())
    #     x = random.randint(0, width)
    #     y = random.randint(0, height)
    #     draw.arc((x, y, x * 4, y * 4), 0, 98, fill=rndColor())

    # 写干扰线
    for i in range(5):
        x1 = random.randint(0, width)
        y1 = random.randint(0, height)
        x2 = random.randint(0, width)
        y2 = random.randint(0, height)

        draw.line((x1, y1, x2, y2), fill=rndColor())

    # img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)
    return img, "".join(code)


if __name__ == '__main__':
    # img是生成的图片对象
    img, code = verify_code()
    print(code)
    with open('../scripts/code.png', "wb") as f:
        img.save(f, format='png')
